void
scsi_amic_start(int unit, boolean_t isread)
{
dma_softc_t *dmap = &scsi_amic_softc[unit];
if (isread)
*dmap->ctrl = MASK8(PDM_SCSI_DMA_CTRL_RUN);
else
*dmap->ctrl = MASK8(PDM_SCSI_DMA_CTRL_DIR)|MASK8(PDM_SCSI_DMA_CTRL_RUN);
eieio();
return;
}
void inline ws_mask(char *buf, int len, unsigned int mask)
{
char *p = buf;
char *end = buf + len;
/* xor first bits, until aligned */
for (; p < end && (((unsigned long)p) % sizeof(unsigned long *)); p++,
mask = ROTATE32(mask))
*p ^= MASK8(mask);
/* xor the big chunk, which is aligned */
for (; p < end - (sizeof(int) - 1); p += sizeof(int))
*((int *)p) ^= mask;
/* the last chunk may not be processed */
for (; p < end; p++, mask >>= 8)
*p ^= MASK8(mask);
//ws_print_masked(buf, len);
}
void
scsi_amic_end(int unit, boolean_t isread)
{
dma_softc_t *dmap = &scsi_amic_softc[unit];
/*
* Flush out the DMA, and kill it.
*/
eieio();
if ((*dmap->ctrl & MASK8(PDM_SCSI_DMA_CTRL_DIR)) == 0) {
*dmap->ctrl |= MASK8(PDM_SCSI_DMA_CTRL_FLUSH);
do {
eieio();
} while (*dmap->ctrl & MASK8(PDM_SCSI_DMA_CTRL_FLUSH));
}
*dmap->ctrl &= ~MASK8(PDM_SCSI_DMA_CTRL_RUN); eieio();
while (*dmap->ctrl & MASK8(PDM_SCSI_DMA_CTRL_RUN))
eieio();
}
void
scsi_amic_setup(int unit, vm_offset_t addr, vm_size_t data_in_count,
boolean_t isread)
{
dma_softc_t *dmap = &scsi_amic_softc[unit];
*dmap->ctrl |= MASK8(PDM_SCSI_DMA_CTRL_RESET); eieio();
while (*dmap->ctrl & MASK8(PDM_SCSI_DMA_CTRL_RUN))
eieio();
if (addr & 7)
panic("SCSI DMA - non-aligned address");
dmap->base[0] = (unsigned char)((addr >> 24) & 0xff);
dmap->base[1] = (unsigned char)((addr >> 16) & 0xff);
dmap->base[2] = (unsigned char)((addr >> 8) & 0xff);
dmap->base[3] = (unsigned char)((addr) & 0xff);
eieio();
return;
}
